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Jawahar Babu. S,Naveen Kumar Jayakumar,Pearlcid Siroraj The Korean Dental Society of Anesthsiology 2023 Journal of Dental Anesthesia and Pain Medicine Vol.23 No.3
Background: Surgical extraction of impacted mandibular third molars is the most common procedure performed by oral surgeons. The procedure cannot be performed effectively without achieving profound anesthesia. During this procedure, patients may feel pain during surgical bone removal (at the cancellous level) or during splitting and luxation of the tooth, despite administration of routine nerve blocks. Administration of intraosseous (IO) lignocaine injections during third molar surgeries to provide effective anesthesia for pain alleviation has been documented. However, whether the anesthetic effect of lignocaine is the only reason for pain alleviation when administered intraosseously remains unclear. This conundrum motivated us to assess the efficacy of IO normal saline versus lignocaine injections during surgical removal of impacted mandibular third molars. The aim of this study was to assess the efficacy of IO normal saline as a viable alternative or adjunct to lignocaine for alleviation of intraoperative pain during surgical removal of impacted mandibular third molars. Methods: This randomized, double-blind, interventional study included 160 patients who underwent surgical extraction of impacted mandibular third molars and experienced pain during surgical removal of the buccal bone or sectioning and luxation of the tooth. The participants were divided into two groups: the study group, which included patients who would receive IO saline injections, and the control group, which included patients who would receive IO lignocaine injections. Patients were asked to complete a visual analog pain scale (VAPS) at baseline and after receiving the IO injections. Results: Of the 160 patients included in this study, 80 received IO lignocaine (control group), whereas 80 received IO saline (study group) following randomization. The baseline VAPS score of the patients and controls was 5.71 ± 1.33 and 5.68 ± 1.21, respectively. The difference between the baseline VAPS scores of the two groups was not statistically significant (P > 0.05). The difference between the numbers of patients who experienced pain relief following administration of IO lignocaine (n=74) versus saline (n=69) was not statistically significant (P > 0.05). The difference between VAPS scores measured after IO injection in both groups was not statistically significant (P >0.05) (1.05 ± 1.20 for the control group vs. 1.72 ± 1.56 for the study group) Conclusion: The study demonstrates that IO injection of normal saline is as effective as lignocaine in alleviating pain during surgical removal of impacted mandibular third molars and can be used as an effective adjunct to conventional lignocaine injection.
A Rare Case of Male Primary Breast Lymphoma
Jawahar Rathod,Kishor Taori,Amit Disawal,Prajwaleet Gour,Suresh Dhakate,Rachna Mone,Krishna Prasad Bellam 한국유방암학회 2011 Journal of breast cancer Vol.14 No.4
Primary lymphoma of the breast is a rare occurrence because of the paucity of lymphoid tissue in the breast and is an even rarer entity in the male breast. Imaging, along with tissue diagnosis goes a long way in diagnosing breast lymphoma which has a significantly different management scheme than other breast neoplasms with respect to radio-chemotherapy rather than surgical resection. We present a case of primary male breast lymphoma which was evaluated with magnetic resonance imaging as well as other conventional imaging modalities and was treated by chemotherapy with a 7-month follow-up.
Flexural studies on reinforced geopolymer concrete beams under pure bending
Sreenivasulu, C.,Jawahar, J. Guru,Sashidhar, C. Techno-Press 2019 Advances in concrete construction Vol.8 No.1
The present investigation is mainly focused on studying the flexural behavior of reinforced geopolymer concrete (RGPC) beams under pure bending. In this study, copper slag (CS) was used as a partial replacement of fine aggregate. Sand and CS were blended in different proportions (100:0, 80:20, 60:40 and 40:60) (sand:CS) by weight. Fly ash and ground granulated blast furnace slag (GGBS) were used as binders and combination of sodium hydroxide (8M) and sodium silicate solution were used for activating the binders. The reinforcement of RGPC beam was designed as per guidelines given in the IS 456-2000 and tested under pure bending (two-point loading) after 28 days of ambient curing. After conducting two point load test the flexural parameters viz., moment carrying capacity, ultimate load, service load, cracking moment, cracking load, crack pattern and ultimate deflection were studied. From the results, it is concluded that RGPC beams have shown better performance up to 60% of CS replacement.
Efficient Spectrum Allocation with Survivability Technique in Elastic Optical Networks
Pushpanathan Krishnamoorthy,Sivasubramanian Arunagiri,Jawahar Arumugam,Jesuwanth Sugesh R.G,MenaghaPriya.B.R 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.3
In recent years, traffic requirement with variable bit rates and Quality of Service due to online High Definition video streaming, downloading movies and transferring of files are being satisfied with Elastic Optical Network (EON). Most efficient spectrum utilization is required to satisfy the demand with minimum blocking probability. The network is unstable and a small failure can lead to tremendous loss of data, hence survivability is mandatory. Slot Capacity based Spectrum Allocation with Survivability (SCSAS) algorithm is proposed which aims at the efficient spectrum utilization and configuration of protection paths. Duty Cycle Division Multiplexing (DCDM) and hop based modulation technique are also introduced to manage the spectrum which further reduces the spectrum wastage. The formation of spectrum fragments on the termination of existing requests increases the blocking probability. In order to improve the spectrum utilization, a spectrum defragmentation technique is introduced in the proposed work. Dynamic configuration of backup paths provides survivability. Results show an increase in free spectrum for dynamic requests, lesser spectrum wastage, and reduced blocking probability than the traditional algorithms such as fixed, flexible and random spectrum allocation.
P. Rajasekaran,V. Jawahar Senthilkumar 한국전기전자재료학회 2018 Transactions on Electrical and Electronic Material Vol.19 No.4
Multilevel inverters have become popular in recent years in high power applications; they provide an eff ective solution forincreasing power and minimizing the harmonics of AC waveforms. The fast response and robust method of conventionaldirect torque control are used in variable speed drives for the reduction of torque ripple. However, major problems occur atsteady-state notable torque, fl ux, and current pulsations in direct torque control drives. This paper presents various strategiesin the direct torque and fl ux control of induction motors for the reduction of torque ripple based on a multilevel neutral pointclamped (NPC) inverter. This kind of inverter is used to achieve better harmonic reductions than the traditional two-levelvoltage source inverters and the related control scheme serves to minimize semiconductor losses. The performance of aninduction motor depends upon a mathematical model that comprises the variations in parameters, common-mode voltage,noise, fl ux variation, and levels of harmonics in a machine. Here, the torque ripples and voltage saturations are the mostsubstantial problems in electrical drive applications. To overcome this problem, the direct torque and fl ux control (DTFC)technique based on multilevel NPC inverter topology is developed. Moreover, the various control strategies-based DTFC isproposed for the minimization of torque ripple in IM drives. An improved control scheme is used to optimize the regulationof torque and speed with less torque response. This paper proposes the comparative study of the THD analysis of diff erentcontrol techniques (PI, fuzzy, ANFIS) that is eff ectively used for harmonic moderation in the design of diff erent NPC multilevelinverter; this goal is achieved as shown from the comparison of simulation results using the MATLAB/SIMULINKenvironment.
Hybrid Nanocomposites: Processing and Properties
Shi, Y.,Kanny, K.,Jawahar, P. The Korean Society for Composite Materials 2009 Advanced composite materials Vol.18 No.4
Epoxy/S2-glass reinforced composites (SGRPs) infused with Cloisite 30B nanoclays were manufactured using the vacuum assisted resin infusion molding (VARIM) process. Prior to infusion, the matrix and clays were thoroughly mixed using a direct mixing technique (DMT) and a high shear mixing technique (HSMT) to ensure uniform dispersion of the nanoclays. Structures with varying clay contents (1-3 wt%) were manufactured. Both pristine and SGRP nanocomposites were then subjected to mechanical testing. For the specimens manufactured by DMT, the tensile, flexural, and compressive modulus increased with increasing the clay content. Similarly, the tensile, flexural, compressive, interlaminate shear and impact strength increased with the addition of 1 wt% clay: however the trend reversed with further increase in the clay content. Specimens manufactured by HSMT showed superior properties compared to those of nanocomposites containing 1 wt% clay produced by DMT. In order to understand these phenomena a morphological study was conducted. Transmission electron microscopy (TEM) micrographs revealed that HSMT led to better dispersion and changed the nanoclay structure from orderly intercalation to disorderly intercalation giving multi-directional strength.
Mohamed, Shamsudeen Varisai,Jawahar, Manikam,Thiruvengadam, Muthu,Jeyakumar, Masilamani,Jayabalan, Narayanasamy Pillai The Korean Society of Plant Biotechnology 1999 Plant molecular biology and biotechnology research Vol.1 No.2
A method for induction of multiple shoots using cotyledonary nodes and shoot tips of Macrotyloma uniflorum (Lam.) Verdc. was described. The experiment was conducted in which shoot induction was noticed on Murashige and Skoog (MS) medium supplemented with different concentrations and combinations of four cytokinins (KIN, 2iP, Ads, BAP). These multiple shoots were later developed into normal shoots. The highest rate of shoot proliferation came from MS medium added with BAP 1.5 mg/L. The multiple shoot buds were subcultured into MS medium with BAP (0.5-1.5 mg/L) along with Ads (1.0 mg/L) and GA$_3$ (0.5 mg/L), which gave rise to the highest frequency of shoot proliferation and elongation. The shoots were rooted on MS medium supplemented with 1.75 mg/L IBA.